Clues and Ideas

Articles
Title
Small DC Motor as a Dynamo (IP059)
2N4987 and 2N4990 (IP057E)
2N4988 and 2N4989 (IP058E)
2N4983 and 2N4986 (IP055E)
2N4984 and 2N4985 (IP056E)
Three-Way Switch (IP053E)
Two Wire Control for Two Lamps (IP054E)
Two-Way Switch (IP052E)
Extracting Fuses (IP050E)
Hertz Loop (IP051)
Paper Clip as Alligator Clip (IP049E)

Page 5 of 5

Non-inverting gain 30 amplifier (CB6648E)
This two-transistor circuit was found in a 1969 US documentation. Modern equivalent transistors can...
Sensitive Touch Switch (CB488)
A touch in this circuit turns-on the lamp or the relay. Power supply is according the lamp or...
540 mW amplifier (CB21801E)
Using germanium transistors, this amplifier provides a 540mW output power when powered by 9V. We...